Super-Poissonian noise from quasiparticle poisoning in electron transport through a pair of Majorana bound states
arXiv:2409.05594 · doi:10.1103/m3gq-x86z
Abstract
Topological qubits based on non-abelian Majorana bound states (MBSs) are protected by parity which is challenged by quasiparticle poisoning (QPP). In this work, we show how QPP affects transport through a pair of coupled MBSs weakly connected to two current leads, using an open system approach and full counting statistics. We find that the correct low-energy physics requires to include next to leading order tunneling events in the coupling to the leads. In particular, our results show that QPP causes super-Poissonian local shot noise with a Fano factor that diverges with decreasing bias voltage, while the current and the non-local (cross-)noise are only little affected. We explain that these features are a direct consequence of the nature of MBSs being their own antiparticle making noise measurements a viable tool to search for MBSs in the presence of QPP.
6 pages, 3 figures, v2 with extended supplemental material and updated references
References in corpus (25)
- Non-Abelian Anyons and Topological Quantum Computation
- Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
- Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
- Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
- Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device
- Majorana bound states in a coupled quantum-dot hybrid-nanowire system
- Transport spectroscopy of NS nanowire junctions with Majorana fermions
- Towards a realistic transport modeling in a superconducting nanowire with Majorana fermions
- Observing Majorana Bound States in p-wave Superconductors Using Noise Measurements in Tunneling Experiments
- Majorana qubit decoherence by quasiparticle poisoning
- Majorana box qubits
- Theory of the Franck-Condon blockade regime
- InAs-Al Hybrid Devices Passing the Topological Gap Protocol
- Parity qubits and poor man's Majorana bound states in double quantum dots
- Quasiparticle relaxation of superconducting qubits in the presence of flux
- Counting statistics of transport through Coulomb blockade nanostructures: High-order cumulants and non-Markovian effects
- Probing Majorana Physics in Quantum Dot Shot Noise Experiments
- Roadmap towards Majorana qubits and nonabelian physics in quantum dot-based minimal Kitaev chains
- Quasiparticle decay rate of Josephson charge qubit oscillations
- Detecting Majorana modes by readout of poisoning-induced parity flips
- Nonlocality of local Andreev conductances as a probe for topological Majorana wires
- Nonequilibrium finite frequency resonances in differential quantum noise driven by Majorana interference
- Full counting statistics in a Majorana single-charge transistor
- Sub- to Super-Poissonian crossover of current noise in helical edge states coupled to a spin impurity in a magnetic field
- Probing Majorana bound states via a pn-junction containing a quantum dot